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Apache CXF example source code file (Version.java)

This example Apache CXF source code file (Version.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

apache, classloader, cxf, inputstream, inputstream, io, ioexception, properties, properties, string, string, util, version, version, version_base

The Apache CXF Version.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.cxf.version;

import java.io.*;
import java.util.*;

public final class Version {

    private static String version;
    private static String name;
    private static String fullVersion;
    
    private static final String VERSION_BASE = "/org/apache/cxf/version/";

    private Version() {
        // utility class - never constructed
    }

    private static InputStream getResourceAsStream(String resource) {
        ClassLoader cl = Version.class.getClassLoader();
        InputStream ins = cl.getResourceAsStream(resource);
        if (ins == null && resource.startsWith("/")) {
            ins = cl.getResourceAsStream(resource.substring(1));
        }
        return ins;
    }
    
    private static synchronized void loadProperties() {
        if (version == null) {
            Properties p = new Properties();

            try {
                InputStream ins = getResourceAsStream(VERSION_BASE + "version.properties");
                p.load(ins);
                ins.close();
            } catch (IOException ex) {
                // ignore, will end up with defaults
            }

            version = p.getProperty("product.version", "<unknown>");
            name = p.getProperty("product.name", "Apache CXF");
            fullVersion = name + " " + version;
        }
    }

    public static String getCurrentVersion() {
        loadProperties();
        return version;
    }

    public static String getName() {
        loadProperties();
        return name;
    }

    /**
     * Returns version string as normally used in print, such as Apache CXF 3.2.4
     *
     */
    public static String getCompleteVersionString() {
        loadProperties();
        return fullVersion;
    }
}

Other Apache CXF examples (source code examples)

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